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Boletus Mutabilis
Boletus mutabilis
Cap - Brown, becoming blackish; smooth and shining; or dry, somewhat woolly.
Flesh - Bright yellow, promptly changing to blue when wounded.
Tubes - Yellow, changing to greenish yellow, and quickly becoming blue when wounded. Mouths large and angular.
Stem - Stout, bright yellow within, covered with brown and dotted scales.
Habitat - Dense woods.